Do not run commands outputting to standard output (echo, module list, etc) in .bashrc for non-interactive SSH sessions. It breaks fundamental functionality (scp, PBS) of your account! Take care for SSH session interactivity for such commands as stated in the previous example.

As we wrote earlier, we are using EasyBuild for automatized software installation and module creation.

EasyBuild employs so-called compiler toolchains or, simply toolchains for short, which are a major concept in handling the build and installation processes.

A typical toolchain consists of one or more compilers, usually put together with some libraries for specific functionality, e.g., for using an MPI stack for distributed computing, or which provide optimized routines for commonly used math operations, e.g., the well-known BLAS/LAPACK APIs for linear algebra routines.

For each software package being built, the toolchain to be used must be specified in some way.

The EasyBuild framework prepares the build environment for the different toolchain components, by loading their respective modules and defining environment variables to specify compiler commands (e.g., via $F90), compiler and linker options (e.g., via $CFLAGS and $LDFLAGS), the list of library names to supply to the linker (via $LIBS), etc. This enables making easyblocks largely toolchain-agnostic since they can simply rely on these environment variables; that is, unless they need to be aware of, for example, the particular compiler being used to determine the build configuration options.

Recent releases of EasyBuild include out-of-the-box toolchain support for: